When comparing Codelearn vs Thinkster, the Slant community recommends Thinkster for most people. In the question“What are the best websites to learn to code?” Thinkster is ranked 16th while Codelearn is ranked 50th. The most important reason people chose Thinkster is:
The tutorials walk you through building different apps such as a Slack clone and simplified Google+ clone.
Specs
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Pros
Pro Runs in the browser
Since setting up the development environment can be difficult for a beginner, Codelearn provides a complete Rails environment on the browser ("Codelearn Playground").
Pro Real-world projects
The tutorials walk you through building different apps such as a Slack clone and simplified Google+ clone.
Pro Available online, as a PDF and screencast
Depending on your needs or wishes you can get the ebook, screencasts, sample code on thinkster.io.
Cons
Con Requires some knowledge of linux
The Playground emulates a linux environment, so it's best to have some experience with linux or you may find yourself lost.
Con Monthly subscription to access videos
With a free account, you are able to view all the text in a tutorial. However to view the videos, you have to sign up for a monthly subscription ($19/month).